ATE16050T1 - SENSOR WITH MAGNETIC DUAL-CORE AMPLIFIER. - Google Patents
SENSOR WITH MAGNETIC DUAL-CORE AMPLIFIER.Info
- Publication number
- ATE16050T1 ATE16050T1 AT81901401T AT81901401T ATE16050T1 AT E16050 T1 ATE16050 T1 AT E16050T1 AT 81901401 T AT81901401 T AT 81901401T AT 81901401 T AT81901401 T AT 81901401T AT E16050 T1 ATE16050 T1 AT E16050T1
- Authority
- AT
- Austria
- Prior art keywords
- current
- magnitude
- primary
- cores
- polarity
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/18—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using conversion of DC into AC, e.g. with choppers
- G01R19/20—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using conversion of DC into AC, e.g. with choppers using transductors, i.e. a magnetic core transducer the saturation of which is cyclically reversed by an AC source on the secondary side
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Current Or Voltage (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
- Amplifiers (AREA)
- Measuring Magnetic Variables (AREA)
- Geophysics And Detection Of Objects (AREA)
- Measuring Fluid Pressure (AREA)
- Level Indicators Using A Float (AREA)
Abstract
A magnetic amplifier sensor for measuring the magnitude and polarity of a DC current flowing in a line (10) includes a pair of saturable cores (32, 34) each having a primary (28, 30) and secondary (36, 38) winding mounted thereon. The primary coils (28, 30) are connected in series and a portion of the DC current component to be measured is diverted to a shunt circuit (16) which includes the primary windings. The secondary coils (36, 38) are connected to a push/pull type of AC source (40, 42) so that the flux levels in the cores operate in a drive/reset mode. A DC current in the primary winding (28, 30) causes a variation in the absolute magnitude of the flux levels of the two cores (32, 34) as a function of the time constant of the circuit so that during the drive interval one core saturates before the other. After rectifying, a differential signal is formed which when integrated provides an output signal whose magnitude is indicative of the magnitude DC component of current in the shunt circuit (16) and where polarity is indicative of the polarity of the DC component of current in the shunt circuit (16). A second embodiment of a magnetic amplifier sensor includes an additional winding (137, 139) on each of the saturable cores (132. 134). A portion of the output signal is fed back to the two additional windings (137, 139), which are connected in series, to provide the negative feedback for improving overall input-to-output linearity, and also for enhancing the response time of the amplifier sensor.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP81901401A EP0067153B1 (en) | 1980-12-19 | 1980-12-19 | Dual core magnetic amplifier sensor |
PCT/US1980/001714 WO1982002253A1 (en) | 1980-12-19 | 1980-12-19 | Dual core magnetic amplifier sensor |
Publications (1)
Publication Number | Publication Date |
---|---|
ATE16050T1 true ATE16050T1 (en) | 1985-10-15 |
Family
ID=22154696
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AT81901401T ATE16050T1 (en) | 1980-12-19 | 1980-12-19 | SENSOR WITH MAGNETIC DUAL-CORE AMPLIFIER. |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0067153B1 (en) |
JP (1) | JPH037071B2 (en) |
AT (1) | ATE16050T1 (en) |
DE (2) | DE67153T1 (en) |
WO (1) | WO1982002253A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB8309559D0 (en) * | 1983-04-08 | 1983-05-11 | Ass Elect Ind | Dc current transformer circuits |
CN114994389B (en) * | 2022-05-25 | 2023-09-26 | 北京中联太信科技有限公司 | Magnetic superconducting micro-direct current detection device and method |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2657281A (en) * | 1950-02-15 | 1953-10-27 | Ward Leonard Electric Co | Electromagnetic audio amplifier |
US2892155A (en) * | 1954-08-09 | 1959-06-23 | Westinghouse Electric Corp | Apparatus responsive to direct quantities |
DE1265858B (en) * | 1963-09-27 | 1968-04-11 | Licentia Gmbh | Directional DC voltage isolating converter |
US3135911A (en) * | 1963-11-15 | 1964-06-02 | Magnetics Inc | Polarity sensitive saturable core reactor |
US3351851A (en) * | 1964-06-26 | 1967-11-07 | Foxboro Co | Balanced magnetic amplification and process control apparatus |
DE1763343C3 (en) * | 1968-05-09 | 1974-02-14 | Calor-Emag Elektrizitaets-Ag, 4030 Ratingen | DC converter |
US3855528A (en) * | 1973-04-06 | 1974-12-17 | Lorain Prod Corp | D-c current measuring circuit |
-
1980
- 1980-12-19 AT AT81901401T patent/ATE16050T1/en not_active IP Right Cessation
- 1980-12-19 DE DE198181901401T patent/DE67153T1/en active Pending
- 1980-12-19 DE DE8181901401T patent/DE3071179D1/en not_active Expired
- 1980-12-19 EP EP81901401A patent/EP0067153B1/en not_active Expired
- 1980-12-19 WO PCT/US1980/001714 patent/WO1982002253A1/en active IP Right Grant
- 1980-12-19 JP JP56501816A patent/JPH037071B2/ja not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP0067153A1 (en) | 1982-12-22 |
JPH037071B2 (en) | 1991-01-31 |
WO1982002253A1 (en) | 1982-07-08 |
JPS57501975A (en) | 1982-11-04 |
EP0067153B1 (en) | 1985-10-09 |
DE67153T1 (en) | 1983-04-14 |
EP0067153A4 (en) | 1983-04-25 |
DE3071179D1 (en) | 1985-11-14 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
UEP | Publication of translation of european patent specification | ||
REN | Ceased due to non-payment of the annual fee |